Automatic oil regulator



'Aug- 1949- H. M. MITCHELL 2,480,757

AUTOMATIC OIL REGULATOR Filed Oct. 28, 1947' 2 Sheets-Sheet 1 I N VEN TOR.

'rru R N EYS Harry/71 NafcZeZ Z Aug. 1949- H. M. MITCHELL 2,480,757

AUTOMATIC OIL REGULATOR Filed Oct. 28, 1947 2 Sheets-Sheet? was H I I I I I I I I I Kl INVENTOR.

ATTD RN EYS Patented Aug. 30, 1949 N [TED S TATES F :I CE

AUTOMATIC OIL REGULATOR .Henry M. Mitchell, :EinktilililLN Application 'Bctober 28, 1947,.SeriaLNo. 782,620

.3 Claims.

This invention relates to automatic oil reguletters.

:Itds an :ohj ect :of the :present invention to proaide an :automatic oil' regulatcr which particularlyadapted :for =usewith50il =burners which are used for curing tobacco initobaecohousestor barns whinhizwill tout the oil and give a signal if the temperature goes above aip-redeterminedpoint in the dearnand wherein regardless of the change inatemperature son the outside :of the Joarn, the temperature will mot arise sin the barn when the leaf :dries out and iby'ithe :use' of the regulator the temperaimre awithin thei barn :can be easily lowered as the dobacco dries out and-la regulation must be made to keep the burner and Nike temperatnreiromigetting toolhigh again and wherein the oil flow to the burners can be arranged to give a heat from the burners "of from 80 degrees Fahrenheit .to 210 degrees Fahrenheit witheniy' a 2 degree variation permitted when :a :setting has been efiected.

Other objects of the present invention are to provide a. regulator which :does not need electric current to eperate the same, which is ofsimple construction, which will remaincutofi until again set by the operator, inexpensive .to manufacture and efiicient in operation.

For other-objects and for ahettm' understanding .ofthednvention, reference 'may be dead to the .iollowing detailed description takeni-in' connection with the accompanying drawing, in which Fig. 1 is a top plan view of the burner control embodying the features of the present invention.

Fig. 2 is a front elevational view of the control box.

Fig. 3 is a sectional View, in elevation, taken on line 3-3 of Fig. 1.

Fig. 4 is a sectional view, in elevation, taken on line 44 of Fig. 2.

Fig. 5 is a perspective view of the member within the control box for supporting the adjusting screws.

Fig. 6 is a side elevational view of the indicating arm.

Fig. 7 is a front elevational view of the indicating arm.

Referring now to the figures, It represents thecontrol box which is disposed on the barn wall by fastening screws l2 extending through lugs l3 and fixed to the barn wall. The control box is disposed at a higher level than the oil valve M which controls the flow of oil from a storage tank l5 and to a burner not shown. The oil valve casing and "another 'pipe 11 "which can extend to a burner. Withinthe *o'ii valve is "a throttle valve element *lB normally "held in a "lifted position by a "spring l9 reacting between a head H on the valve element and a *fitting 22 for connec'tm-g the oil -valve +4 to the control box It.

On the top of the 'control box "H! is a casing 25 which contains a bellows '26 -with"an adjustable projection "21 which extends downwardly through-an opening in the top of the box. This bellows '26 is connected by a tube '28 with a thermal responsive device 31 supported :on 'a bracket 32 connected to 'wall 33 of the barn and on the interior thereof to be responsive to the inside temperature.

Beneath the projection of the bellow-is a bell crank member for adjusting screw support :34 which is pivoted on :a pin %5 carried on "a bracket 36 on the interior of the box. "This member 34 contains adjustable screws .31 adapted'to engage with the head "21 of the valve element H3. :The projection 21 of the bellows is adjustable Within the bellows and is adapted to enter a depression 310 *on the member 34 to force the member so that the adjusting screws 3| will-be in engagement with the valve element 18 to moveit downwardly as the 'bellows expand to reduceithe flow of oilto the burner. The lower 'end of the Valve element has "elongated slots 38 and the further the valve lil is moved downwardly -the less -oil passes through these slots.

To set the member 34, an adjusting screw 4| is turned by a crank 42. This screw is threaded in an indicating member 43, Figs. 6 and '7, which will be moved along a scale 44, Fig. 2, so that its point 45 will register with any one of a desired temperature reading to which temperature the barn is to be kept. On the depending arm of the bell crank 34 is a projection 45 to which spring 46 is anchored. This spring is connected to the member 43. As the member 43 is adjusted a greater pull will be placed upon the spring 46 and upon the member 43 whereby to elevate the member 34 to a greater extent to reduce the size of the bellows 26.

The temperature can be found to which the scale can be set by allowing the barn to be heated to have a yellowing effect upon the tobacco and then turning the screw 4| until the member 34 is brought tight against the projection 21 of the bellows. Thereafter the regulator will keep this same temperature in the barn. To increase the temperature within the barn, the crank will be turned a little at a time until the barn temhas a pipe l6 extending from the tank l5 to its perature reaches the same as the setting of the pointer upon the scale 44. Screw 5| in the top of the box If] serves as a stop to keep the member 34 from rising. This stop 5| is adjustable. A plug 52 can be removed from the box in order to gain access to the adjustable screws 34.

There are two oil valves 14 connected to the box and there is one adjustable screw 3! for each oil valve. Thus the burners can be adjusted so that one can receive more oil than the other.

If the temperature in the building rises, the bellows will force the member 34 down against the action of the spring 46 and will close the valve l8 slightly. As soon as the pressure decreases on the member 34, spring 46 will pull the member up and increase the oil flow whereby to keep a steady temperature in the building at all times.

If the valve element i8 is moved at'any time to the full lowered position to cut off the flow of oil or fluid to the burner, a latch 53 will be raised under bell crank arm 54 of the member 34 to make contact with a terminal 55 whereby to close a circuit including a bell 56 and a battery 51 whereby to ring the bell. The member 34 will thus be held in a lowered position by the latch 53. If it is desired that the bell will not be operated a pivot arm 58 is fitted into a notch 59 on a portion of the latch which extends below the bottom of the control box. The regulator must thereafter be reset. A spring 5! is connected to the latch 53 to urge the same toward the end 54 of the member 34. The bell accordingly will give warning when the burners have been turned oif.

The member 34 has depending portions 63 serving to support the adjustable screws 31 which extend through holes 64 and 65 of the member, Fig. 5.

While various changes maybe made in the detail construction, it shall be understood that such changes shall be within the spirit and scope of the present invention as defined by the appended claims.

I claim: 1. A burner control arrangement comprising a control casing, a valve housing connected to the casing, a Valve operable within the valve housing to control the amount of fluid to be delivered to the burner, a member pivotally connected to the casing and including means adapted to engage with the valve element, biasing means for extending the valve element into engagement with the pivoted member, and a thermal responsive device having portions engageable with the member to urge the member upon the valve element and to cause its actuation within the valve body to control the flow of fluid passing therethrough, and an adjustable screw in the casing and adapted to be turned by hand, a member on the screw having an indicator arm projection through the casing, a; scale on the casing by which reading may be made, and a tension spring extending between the pivoted member and the member on the adjustable screw whereby to urge the pivoted member toward the thermal responsive device, and a spring latch adapted to cooperate with the pivoted member to retain the valve in a closed position when the temperature has been increased beyond a predetermined limit, and a signal device responsive to the operation of the latch for giving a signal when the burners have been turned oil.

2. A burner control as defined in claim 1 and a pivoted member on the exterior of the casing and adapted to cooperate with said latch to hold the latch so as to be inefiective and thereby to elminate the signal device.

3. A burner control as defined in claim 1 wherein said pivoted member is in the form of a bell crank having depending portions extending from one of the arms and at the opposite side of the same, and said engaging means for the member comprising an adjusting screw extending between the depending portion and the arm itself, said spring being anchored to the other arm of the member.

HENRY M. MITCHELL.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 760,443 Fulton May 24,1904 2,129,937 Johnson Sept. 13,1938 2,169,284 Ploeger Aug. 15, 1939 2,203,153 Johnson June 4, 1940 2,332,556 Breese Oct. 26,1943 2,341,647 Parkhurst Feb. 15, 1944 2,387,793 Holmes Oct. 30, 1945 

